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2020-07 22

[Academics]Professor Lee Young-moon Creates an Application that Prevents Smartphones Shutting Down in Cold Weather

Professor Lee Young-moon's team of professors from the department of Robotics at Hanyang University created a technology that prevents smartphones from turning off in cold weather, reported Hanyang Univerisity on the 15th. Older smartphones turn off in cold weather more frequently causing extreme inconvenience to the users. The solution to this problem has become a big interest in the mobile industry. Professor Lee Young-moon Initially, the system in smartphones minimizes the usage of electricity at high temperatures while maximizing electricity usage at low temperatures to prevent heating issues. However, at low temperatures, the internal resistance of the battery increases rapidly. This, along with an increase in electricity usage, causes the battery supply to drop quickly. This results in the smartphone turning off. Professor Lee Young-moon's team from the department of Robotics created an application called Battery-Aware Power Management (BPM), together in collaboration with Professor Shin Kang-Gun of Michigan University in the United States, which solves this problem. The joint research team improved operational stability with a smartphone application by analyzing battery capacity and controlling the decrease in battery voltage in cold environments without the use of additional equipment. After various tests by the OEM, the joint research team found out that the battery availability increased by 38%, and the operating time improved by 30% at a temperature of minus 5 degrees Celcius. This research was supported by Hanyang University (Task name: Embedded System Battery and Power Management) and the American Science Foundation. The results of the study (Paper name: Causes and Fixes of Unexpected Phone Shutoffs) was published at ACM MobuSys 2020, the most prestigious academic conference in the field of mobile systems, and presented at on open online conference (https://www.youtube.com/watch?v=L1exSp00ZJg) last month. For more information, visit [[HYUwiki]]에서 자세히 보기 : hyu.wiki/스마트폰꺼짐방지앱 Global News Team Global@hanyang.ac.kr Translation by: Lee Hee-jin

2020-07 22

[Academics]Professor Jung Jin-wook's Work Selected as the 2020 Samsung Science & Technology Foundation Research Subject

Professor Jung Jin-wook’s (Division of Electrical and Biomedical Engineering) "1 nm damage-free atomic layer etching source technology using electrons" (Disruptive semiconductor structure and realization technology) has been selected as the 2020 Samsung Science & Technology Foundation’s specified support research subject. Samsung Electronics has been supporting and developing future science technology through the contribution of 1.5 trillion won over the last 8 years as a part of the Samsung Science & Technology Foundation. The foundation selects subjects in the ICT field of basic science to support in the first and second half of each year for national research in the field of future technology through the annual Designated Theme Task Contest. This year, 12.35 billion won will be provided to 12 research subjects across six fields. The six themes selected this time were ▲Disruptive semiconductor structure and realization technology ▲Next generation spontaneous emission displays ▲Cell therapy products for curing incurable diseases ▲Source technology for the practical use of quantum computing ▲Next generation realistic media devices and processing technology ▲B5G & 6G Communication. Professor Jung is a renowned authority in the field of etching technology, which is necessary for next generation semiconductor development. Professor Jung plans to develop etching technology using electrons that do not damage the semiconductor board and clips off a semiconductor wafer to 1 nm. His goal is to create technology that enables etching large-scale electrons without silicon board damage. It is expected to enhance semiconductor efficiency, which is currently maxed out, by 1,000~10,000 times when this technology becomes commercialized. Samsung Electronics has invested a total of 771.3 billion won through the Samsung Science & Technology Foundation across 601 fields including 201 fields in basic science, 199 fields in the materials sector, and 201 fields in ICT. There have been 1,241 supported research papers published in international journals. In particular, there have been 93 papers introduced in world-class international journals such as Science (5 papers), and Nature (2 papers). Global News Team global@hanyang.ac.kr Translation by: Park Gyeong-min

2020-07 16

[Academics]Professor Ko Min-jae's Joint Research Team Has Developed the New Perovskite Quantum Dot Solar Battery

Hanyang University's Department of Chemical Engineering Professor Ko Min-jae's team announced on July 14 that together with DGIST Department of Energy Convergence Research Center's Professor Kim Young-hoon they have developed the New Perovskite Quantum Dot Solar Battery. This technology also holds light energy electroluminescence characteristics and is expected to contribute to the commercialization of optical technologies such as building-integrated solar energy generation, multi-functional photoelectric devices, and Li-Fi. Quantum dots have great light-absorbing capacities and are one of the key elements of next-generation solar batteries, which absorb light from large areas. The perovskite quantum dot solar battery has the ability to transfer light into electric energy and electricity into light, and is known to have the highest efficiency in the quantum dot solar battery field. In order to synthesize superior perovskite quantum dots, organic ligands, which have a long hydrocarbon chain, are used. Ligands adhere to small perovskite quantum dots of 10 nanometers (nm) on the surface and allow them to disperse in diverse nonpolar solvents. When these quantum dots are well-arranged on boards, quantum dot solar batteries are created. Here, as a long-chain ligand adheres to a quantum dot’s surface, it makes the charge transfer difficult between quantum dots, a process which degenerates solar battery functions and where transfering it to the ligand chain where hydrocarbon is required. The research team focused on the hydrophobicity (not easily combine with water molecules) of benzene group-based phenethylammonium (PEA) ligands. They then succeeded in applying this safely to the perovskite quantum dot's surface. Through this, they improved the efficiency of transforming solar energy into electric power to 14.1% and additionally tried to keep high photovoltaic efficiency stability of over 90% for 15 days in an environment with relative humidity of 20~25%, which is similar to external environments. Doctor Kim Young-hoon said that “we investigated and have discovered for the first time that by applying a ligand which holds both a short hydrocarbon chain and hydrophobicity, that both a quantum dot solar battery’s performance and safety can be improved at the same time,” and that “this will provide a new paradigm for developing and commercializing a next generation quantum solar battery”. In this research, Hanyang University's Department of Chemical Engineering's master’s and doctorate program student Kim Ji-gun and the DGIST Department of Energy Convergence Research Center's post-doc participated as the lead author and was published online in Nano Energy, a world-class journal in the energy science field, on June 15. A performance and safety evaluation of a perovskite quantum dot solar battery with a short hydrophobicity ligand. (photo by: DGIST) Global News Team global@hanyang.ac.kr Translation by: Park Gyeong-min

2020-07 09

[Academics]Professor Choi Chang-hwan's Team Develops a New Material for Steel-genetics that Is Diversifiable into 3D Flash Memory Devices

Professor Choi Chang-hwan, Division of Materials Science & Engineering, and Dr. Koo Bon-cheol, a research team student, have developed a new material that can solve the high-density and low-power problems of 3D flash memory devices. This research has been highly praised for opening up the possibility of reducing flash device thickness, which is a task that must be overcome in order to continuously upgrade current 3D flash memory devices. Current 3D flash memory devices use thin-film materials consisting of oxide, nitride, and oxide (ONO) to store memory. This film has a thickness of 20 nm. 3D flash memory devices need continuous enhancement to improve their performance. However, it is difficult to reduce the thickness of existing ONO thin-film, and it is not easy to improve the speed and power of the flash element. In addition, alternative thin-film materials need to be developed due to difficulties in multi-level cells (MLCs) that can store various information in one cell. Professor Choi's team cooled an aluminum-coated substance in Hafnium oxide (HfO2), forming a new thin-film with residual polarization and an avionics field, maximizing the properties of the steel electrode. Flash memory devices with this feature are highly desirable as they can easily be repaired using improved polarizing properties. Moreover, the thin-film thickness can be implemented even if it is under 10 nm. Also, the properties of the steel-genetic have been improved as they induce a stable orthorhombic phase through high-stress deformation. Not only that, but Hafnium oxide is also a material that has been proven to be reliable in the field of logic semiconductors. Manufacturers being able to manufacture new Nand flash memory using this material without further investment is a significant benefit. This study was conducted by a team led by Professor Song Yun-heup, Department of Electronic Engineering, with the support of Samsung Electronics' Future Technology Development Center. It was introduced at a symposium on very-large-scale integration (VLSI) by the Institute of Electrical and Electronics Engineers (IEEE), a world-renowned association on semiconductors, which ran for six days starting on the 14th. In particular, this study was chosen as one of the "highlighted" theses by the technical committee and was introduced to the media, allowing it to gain the spotlight. The Symposia on VLSI Technology and Circuits, which celebrated its 40th anniversary this year, is the most prestigious conference in the field of semiconductors, along with the International Electron Device Meeting (IEDM). Annually, the conference presents the latest research on semiconductors and selects the papers that have contributed the most to semiconductor companies and academia. This year's conference was carried out online due to COVID-19 and received the most theses in 10 years. Out of the 248 papers that were received, 86 papers were selected as the most influential thesis of which only 29 papers were sponsored by universities"?). Professor Choi said, "Technology to implement strong-genetics is emerging as a trend in academia," and he added "this is the first good example that has raised the generation of Hafnium oxide material, which will be used for NAND-flash high-density integration, to nearly universal level." In addition, he mentioned that "Out of the 8 ferrogenic thin-film thesis papers that were chosen, 5 were from companies and 3 were from universities". He said, "The research team from Hanyang University was the only Korean university to have a thesis selected," and added "it is rare to present a research conducted by university without any cooperation or sponsor of enterprises. This study is expected to contribute to the development of the thin-film that can be implemented in 3D flash memory devices." AlHfO2 showing the properties of ferroelectric by quick cooling, completed by Professor Choi Chang-hwan's research team. <Origin: Hanyang University> More on [(HanyangWiki)] http://hyu.wiki/강유전체소재개발 Global News Team global@hanyang.ac.kr Translation by: Lee Hee-jin

2020-07 07

[Academics]Hanyang Intelligence Data System Laboratory Participates in a Consortium for a Digital-Platform-Based Enterprises Support

The Hanyang Intelligence Data System Laboratory of the Department of Industrial Engineering has been selected for the Digital Platform Based Private Business Proliferation Support Project (PoC) being conducted by the National Information Society Agency. The Laboratory will task with supervision and cooperation?) with Autocarz and Genieworks, tackling illegal parking on the digital platform. The project aims to solve Seoul's illegal parking problem by planning and implementing a new business model, using the base of the public consolidated platform developed by the Seoul Metropolitan Government last year. At the same time, the consortium aims to commercialize the business model planned by private enterprises. The consortium is planning to create an artificial-intelligence-based prediction probability model on illegal parking, by collecting, processing, and analyzing various data. Utilizing these data, the consortium is also planning to showcase an array of additional services by the second half of the year. One of the services is an Open API Portal Service on Parking Control Prediction Information, which designs and develops a parking control prediction probability model and provides the generated information to O2O businesspersons in an Open API form. Since the data make it possible to target when and where the number of illegal parking frequently occur, parking lot operators and others can use it as important sources for location-based marketing. Also, it could serve as baseline data for analyzing the business area regarding vehicle maintenance and car wash businesses. Mun Chang-hun, the CEO of Autocarz, mentioned that he hopes to raise awareness about illegal parking problems among drivers through the implementation of this empirical project. He also added that he would like to contribute to the mitigation of traffic through additional services, the creation of new jobs in areas such as parking and car washing through the release of the data to the third parties. Global News Team global@hanyang.ac.kr Translation by: Lee Won-young

2020-06 23

[Academics]Professor Eun Yong-soo Publishes a Book Related to International Relations Theory Through Routledge

Professor Eun Yong-soo Professor Eun Yong-soo from the Department of Political Science and International Studies recently published a book based on his studies related to international political theory through Routledge, a British publishing house. In his latest book, Going beyond Parochialism and Fragmentation in the Study of International Relations, Professor Eun presents limitations and alternatives to the already existing Western-centered theories of international politics. McGill University’s Professor T. V. Paul who is also a former president of the International Studies Association and Professor Colin Wight from the University of Sydney both took part in the publication of Professor Eun’s book. Founded in 1836, Routledge currently has more than 20 SSCI-level Humanities and Social Sciences journals. Meanwhile, as a professor in the Department of Political Science and International Relations, Professor Eun Yong-soo has published his papers as an independent author for all the official journals from the world’s four major political science and diplomacy societies: the American Political Science Association (APSA), the International Studies Association (ISA), the Political Studies Association (PSA), and the British International Studies Association (BISA). He has also been researching international political theory and postcolonialism. The cover of Going beyond Parochialism and Fragmentation in the Study of International Relations *Link for the publisher’s website and Professor Eun Yong-soo’s book: https://www.routledge.com/Going-beyond-Parochialism-and-Fragmentation-in-the-Study-of-International/Eun/p/book/9781138063006 Read more about Professor Eun Yong-soo on [Hanyang Wiki]: hyu.wiki/은용수 Global News Team global@hanyang.ac.kr Translation by: Lee Jung-joo

2020-05 29

[Academics]Hanyang University Professor Jang Yong-woo Opens the Door to Developing Targeted Therapies for Parkinson’s Disease

Professor Jang Yong-woo On May 27, Hanyang University announced that Professor Jang Yong-woo (Department of Biomedical Engineering) recently developed targeted treatment method of Parkinson’s disease. In this study, Professor Jang, along with Professor Kim Kwang-soo of Harvard Medical School’s McLean Hospital and Professor Yoon Ho-seop of Nanyang University of Technology in Singapore, discovered the "ligand"*of the Nurr1 nuclear receptor, which is involved in the generation and maintenance of dopamine neurons. Parkinson’s disease is a degenerative brain disease that is caused by a gradual decrease in nerve cells in the midbrain that secrete dopamine. The Nurr1 Protein inside the dopamine nerve cell is crucial for the dopamine nerve cell generation and survival and is known as an important nuclear receptor that regulates dopamine synthesis. The function of the Nurr1 nuclear receptor is regulated by the ligand, which is a biomolecule that binds with the Nurr1 nuclear receptor, and the Nurr1 nuclear receptor and dopamine can be activated through ligand control. However, until now, there have been limitations on regulating the Nurr1 nuclear receptor with drugs as no ligand has been found. (Photo by: Nature Chemical Biology) Through years of experiments with molecules, structures, cells, and animal experiments, Professor Jang’s team has found that the Lipid Metabolism materials, Prostaglandin E1 (PGE1) and Prostaglandin A1 (PGA1), directly combine into the Nurr1 nuclear receptor and ligand binding domains to control dopaminergic synthesis and the genes necessary to maintain dopamine neurons. In actuality a mouse induced with Parkinson’s disease in an animal model experiment was injected with PGE1 or PGA1 drug and recovered 80% of the Parkinson’s disease affected motor skills. Additionally, when comparing and analyzing the mesencephalon of a mouse, the secretion of dopamine in the midbrain of an animal with drug injection nearly doubled, and the survival rate of dopamine nerve cells increased by up to 80%. Professor Jang Yong-woo said, “The lack of drug effectiveness for Parkinson’s disease has been a major challenge in the development of treatments, and the study found that Nurr1 is no longer a nuclear receptor without ligand.” He also added that “along with the intrinsic metabolites, the discovery of additional synthetic ligands will pave the way for the development of Parkinson’s disease targeted treatment.” These findings were published on May 26 in Nature Chemical Biology, a sister journal of Nature and a world-renowned journal in the field of biochemistry. *Note) Ligand: Substance that uniquely bonds to large molecules such as receptors and plays a major role in the development and use of medicines as well as in vivo. *Introduction to the paper (Nature Chemical Biology) https://www.nature.com/articles/s41589-020-0553-6 Global News Team global@hanyang.ac.kr Translation by: Park Gyeong-min

2020-04 28
2020-04 28 Important News
2020-04 28

[Academics]Professor Kim Do-hwan and His Research Team Develop Ultra-sensitive Iontronic Graphene Tactile Sensors with Ionic Liquid Droplets

Professor Kim Do-hwan’s research team, from Hanyang University’s Department of Chemical Engineering, announced on the 20th that he and Professor Lee Wi-hyoung’s research team, from Konkuk University, developed flexible and transparent iontronic graphene tactile sensors (i-GTS) with superior sensitivity, using the dynamic characteristics of liquid droplets. ▲The following is the mechanism proposed for this study of tactile sensors. A model diagram that senses pressure from changes in capacitance as ionic liquids fixed on the graphene grid comes into contact with the upper graphene electrodes. As wearable sensors have started to become more popular, the need for smart interface technology that can recognize users’ surroundings in real-time, along with electronic skin technology has become more crucial than ever. The most important technology for electronic skins is a tactile sensor technology that has sensitive recognition techniques even under minute pressure. Both research teams took advantage of the phenomenon where ionic liquid was fixed between the two graphene grid layers, and the upper electrodes made of graphene spread in contact with the ionic liquid. Through this, the research team was able to develop an iontronic graphene tactile sensor that is highly sensitive to even the finest touch. Their discovery is highly anticipated, as tactile sensors are manufactured with large-area integrated arrays, they have the advantage of creating less confusion between the devices, which is expected to minimize touch errors. It is expected that the iontronic graphene tactile sensors developed in this study will be applied to various fields, such as flexible displays and healthcare devices, as they have excellent sensitivity sensors and fast recovery speed. The graphene electrodes/active ionic liquid layers are transparent and flexible, so it is expected for them to be used as wearable graphene tactile sensors that can give various visual effects and body adhesion. This study, by Professor Kim Do-hwan (Hanyang University, Corresponding author), Kim Joo-sung, a Ph.D. candidate (Hanyang University, Lead author), Professor Lee Wi-hyoung (Konkuk University, Corresponding author), Researcher Lee Seung-chul (Konkuk University, Lead author, Ph.D. graduate, Researcher for LG Display), received grants from the Ministry of Science and ICT’s Global Frontier Research Program (Center for Advanced Soft Electronics) and from the Basic Science Research Program of the National Research Foundation of Korea. Additionally, this study first demonstrated a paradigm that a graphene tactile sensor can be developed with fast recovery speed using the dynamic characteristics of liquid droplets, and in recognition of its excellence in research, this study was chosen as a cover thesis for the April issue of Advanced Functional Materials (IF = 15.621)’, a leading international academic journal for the field of materials. Global News Team global@hanyang.ac.kr Translation by: Lee Jung-joo

2020-04 14
2020-04 14